"""Pylons environment configuration"""
import os

from mako.lookup import TemplateLookup
from pylons.configuration import PylonsConfig
from pylons.error import handle_mako_error
from sqlalchemy import engine_from_config

import fidoweb.lib.app_globals as app_globals
import fidoweb.lib.helpers
from fidoweb.config.routing import make_map
from fidoweb.model import init_model

def load_environment(global_conf, app_conf):
	"""Configure the Pylons environment via the ``pylons.config`` object"""
	
	config = PylonsConfig()
    
    # Pylons paths
	root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
	paths = dict(root=root,
                 controllers=os.path.join(root, 'controllers'),
                 static_files=os.path.join(root, 'public'),
                 templates=[os.path.join(root, 'templates')])

    # Initialize config with the basic options
	config.init_app(global_conf, app_conf, package='fidoweb', paths=paths)

	config['routes.map'] = make_map(config)
	config['pylons.app_globals'] = app_globals.Globals(config)
	config['pylons.h'] = fidoweb.lib.helpers
    
    # Setup cache object as early as possible
	import pylons
	pylons.cache._push_object(config['pylons.app_globals'].cache)

    # Create the Mako TemplateLookup, with the default auto-escaping
	config['pylons.app_globals'].mako_lookup = TemplateLookup(
        directories=paths['templates'],
        error_handler=handle_mako_error,
        module_directory=os.path.join(app_conf['cache_dir'], 'templates'),
		input_encoding='utf-8', output_encoding='utf-8',
		default_filters=['decode.utf8'],
        imports=['from webhelpers.html import escape'])

    # Setup the SQLAlchemy database engine
	engine = engine_from_config(config, 'sqlalchemy.')
	init_model(engine)

    # CONFIGURATION OPTIONS HERE (note: all config options will override
    # any Pylons config options)
	return config
